I am copying most of what I wrote on my deviantART journal. I think I managed to keep it spoiler-free, but if I missed something, feel free to bring it to my attention so I can fix it.
Also, warning: This is pretty long.
I'll break this down into different aspects: Story, characters, gameplay, visuals, and technical areas. Each category I will divide into what I liked and disliked.
As a frame of reference, I will also include my settings/specs and the Hawkes I played with.
Platform:PC (Windows 7 Ultimate 64 bit) | 8 GB RAM | Intel i7 core | ATi Radeon HD 5770 | 32" HD Vizio TV used as a primary monitor/speakers
Gameplay Settings:Difficulty: Casual
Graphics: Everything on highest setting, including using DirectX 11 and very high texture detail.
Audio: Voices max, music 50%, sound 30%
Mods: Yes, unlocked default Hawke's hairstyles and beard to make them available in the character creator. Nothing else though.
DLC: Exiled Prince, Black Emporium, misc items
Hawkes:Declan: Male rogue (daggers) | Humorous personality | friend romanced Isabela | imported from Legam (mage origin) | ~ 35 hours
Kenley: Male mage (destruction) | Aggressive personality | friend romanced Merrill | imported from Fasais (Dalish origin) | ~ 33 hours
Armela: Female warrior (two-handed) | Diplomatic personality | rival romanced Fenris | imported from Ahmed (casteless origin) | ~ 30 hours
An average Origins run for me was around 35-40 hours, so DA2 wasn't that much shorter for me. I did not complete all the quests/side quests in each play. In fact, I'm pretty sure there's still several quests I haven't tackled yet. For both games.
Gameplay:Liked:- Combat speed and overall controls. They are pretty much the same as Origins, just faster paced. And it's still easily possible to pause and play more tactically. I like to balance between pause and action, and combat served me well in that regard.
- New talent symbols. The diamonds = activated and the hexagon = sustained talents are a nice quick reference.
- Dialogue system
- Personality-based battle cries and cutscene comments
- Improved animations in both combat and cutscenes
- More character creator options
- Family looks changing based off of Hawke's preset and skin. It's not perfect, but it's a step in the right direction.
- New ability trees being branching rather than straightforward
- Friendship/rivalry meter and gaining special abilities based on that for each companion.
- Crafting. I much prefer finding resources that can be reused than lugging around 99 elfroots in my pack all the time.
- Quick heal slots for potions automatically in the quick bar. Saves me from having to take up slots for it.
- Cross-class combos. It really helps re-enforce the whole "team" aspect of a party-based RPG.
- The map and the day/night switch. Nice touch, and it does allow us to see parts of Kirkwall at different times of the day with fewer restrictions than Origins had. It also helps give the feeling that time passed and everything's not crammed into a single day or two. :lmao:
- Hide helmet option in the gameplay settings.
Disliked:- Waves of enemies. I didn't care for it much on the Xbox version of Origins, and I don't care for it much here. Not a major issue, but sometimes I'd think I was done with a fight, and then suddenly another wave drops in. I find that more annoying than exciting.
- Style of the menu screens. I like most of their functionality, but they feel a bit bland. I much preferred the parchment feel of the Origins PC interface.
- The timer for potions. I understand wanting to avoid potion spamming, but I think the cooldown is TOO long. It becomes a real pain in the arse in tougher fights. I don't really play these games for the challenge, but for the general story and characters. A bit of challenge in combat is fine, but stuff like excessively long potion cooldowns has lead me to near game overs, and would've led to actual game overs if I didn't use a cheat or two to stay alive. Yeah, I used a few console cheats. I hate reloading, sue me.
- Exploding enemies. I don't exactly dislike this, but I don't really like it either. It's a bit overkill, especially if you're playing a two-handed warrior. Happens a lot. And you can't turn it off. I figure it's part of Varric's exaggeration and it doesn't bother me very much, but it did get an eyeroll out of me a few times. At least it's not as bad as exploding heads in Fallout 3 every. Single. Time. I got a headshot, though.
Overall:I think gameplay has improved since Origins while still retaining much of the basics. It still feels like Origins, just more reactive. It comes off as a tactical/action hybrid to me, and I like it. It's somewhere between the reflexiveness of Jade Empire and the auto-attack of Neverwinter Nights. Despite a few minor gripes, I am very pleased with the gameplay.
Story:WARNING: Possible spoilers ahead.
Liked:- The more personal, rather than "save the world" focus. I like save the world/galaxy/country stories just fine, but one of the reasons Baldur's Gate II is still a favorite game of mine is due to the personal story focus it has. It feels more intimate and tends to build a stronger attachment between me and my character.
- The passage of time. It's nice to see a place and its people change over the span of several years, rather than a short, chaotic period that spans only a few months or so.
- The chantry/templars versus mages aspect as a core element. DA2 is very political, and while current day politics bore me to death... put political and social issues in a fantasy or historical tale, and I'm fascinated.
- Lots and lots of gray areas. I found myself sympathizing with multiple parties, even as I could condemn them for their actions. There were plenty of genuinely difficult decisions to be made, and more than once I stared at my screen, debating between options.
- Storytelling. While basic elements of the plot might not be the most original or interesting, the way they are presented is very compelling.
- The qunari and their culture. We get to see more of who the qunari are.
- Seeing more of Thedas. While DA2 starts in Ferelden, it's a very, very short part of the game and the focus is Kirkwall, in the Free Marches. I hope the Dragon Age series continues the trend of visiting different locations in each installment. Thedas is a very interesting and compelling setting, and I can't wait to see more of it.
- Returning old faces. There were many cameos and returning characters, minor and major, from Origins. For the most part, they transitioned well and it was nice to see them again. I also liked how some wouldn't appear, or would appear in a different matter, depending on the Origins story you imported. It helps reflect the "world-shaping" goal of the series.
- The framed narrative approach. Varric's conversations with Casandra are amusing, and some of his exaggerations are downright hilarious. It's an interesting approach for a game (if not the first), and I very much enjoyed it.
Disliked:- Time passage. I like that so much time passed, and to at least some extent, it really does feel like time has passed. But in some ways, it's hard to believe time jumped years at a time. This is a difficult thing to implement, though, and I don't think Bioware could've pulled it off perfectly anyway. The attempt is good, but could use some tweaking.
- Lack of an overall goal. Well, this part isn't totally true. Each act has its own obvious goal (go to the Deep Roads, deal with the qunari, etc) and they do help to drive that act. However, when connected together, it just doesn't flow quite as well. It's not bad, but again - something that could be refined should Bioware return to a personal story in the future. And I hope they do!
- Short last act. Act 3 on my first play with Declan took me many hours, because I thankfully avoided main quests. However, there's only about... Three main quests before the climax, and it's VERY easy to go to it too soon. Act 1 was packed with things to do, and it was harder to jump to the Deep Roads early, because the expedition wouldn't leave until Hawke completed a certain amount of key quests. In the end, this makes the start of the game feel more active, but the end thins out a bit and it's almost over too soon.
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White lilies. 
(But I love that I hate that part. It's done VERY well, so in a way I actually like it. It simply just fills me with heartache going through it).
Overall:In many ways, I enjoy the story more than Origins. I like the social focus and the importance of family/companions play. Those are usually the most appealing aspects of a story to me. It's a good set up for some BIG world changing events. The storytelling is excellent, and combined with interesting characters, moved me more than once. Including to tears at one point. Literally. The only problem is that near the end it feels a bit short/sudden, and it feels like we see snippets of tension rather than getting a better look at the whole picture. But even with this fault, it's good.
Characters:Liked:- Multiple quests per companion. Granted, there's only one per act (usually), but it's still more than most games like these.
- The evolution of relationships over time. It's nice to see friendships, rivalries, and romances grow over time. Not just between Hawke and the others, but between the companions themselves.
- Banters. Banters are FANTASTIC. Had me roaring with laughter more than once. Especially since Hawke joins in sometimes. It really helps to give the feel of a group of friends wandering around the city and carrying on conversations, even as they get into trouble.
- Humorous Hawke. A goldmine of hilarity. By far my favorite dominant personality to play. Humorous Hawke is basically a troll, and what a fantastic troll he/she is. The fact humorous lines often lead to friendship boosts with Varric and Isabela is also a nice touch.
- Gifts. They've been improved. You can no longer spam for approval - the gifts actually feel important, and they remove that loophole of cheating to get a high relationship rating. In fact, depending on your current status with a companion, you can actually get rivalry points for a gift - or even have them reject a gift outright. It feels much more realistic.
- All the companions were well-written and I loved traveling around with them. The only one I'm a bit "meh" on is Sebastian. He's not flat, but he just doesn't flow quite as well as the others. And I'm still not sure if I like him or not. He has some great lines and interactions, but sometimes he annoys me as well. Still, that awesome Scottish accent wins him some points.
- Aveline's Act 2 quest. I haven't giggled so much doing a side quest in... Well, perhaps ever. It's even better if you bring Isabela or Merrill along.
- Isabela, Merrill, Aveline and Varric were my favorite companions. I also loved Bethany during Declan's play - they had an awesome brother-sister friendship dynamic that you don't usually get to see in fantasy games. Carver I loved to hate - or, rather, like with frustration. I'm not one for broody types, but Fenris I liked for the most part. Not because he's broody, but because he's such a blunt **** it's hilarious. Anders I liked, but not as much as in Awakening. Still, I thought his changes and role in the story were very interesting and he's still very compelling. But I didn't feel like bringing him along as much as the others. Also, Dog and his relationship to companions is even more amusing than the first game. I love the mabari - probably more than in Origins, and I loved that mutt too.
- Romances. Especially Merrill's. Hers was my favorite out of those I played. The scenes that were there were good and for the most part, I felt like relationships developed between time jumps. Also, the sex scenes are MUCH better and MUCH less awkward than Origins. They're not free from awkwardness - I blame the innate "uncanny valley" nature of most game graphics for that - but they're a vast improvement from the underwear grinding of Origins.
Disliked:- Romances. They were good, but they also felt spread a little thin sometimes. While the actual number of conversations are more or less the same as romances in Origins, because of the time jumps, they feel thinner. Actual scenes themselves are executed well, but I feel like there should've been more in between. Most of the stuff is in Act 2, leaving 1 and 3 feeling a bit sparse in that area. Act 1 is understandable, but at the very least Act 3 should've had a bit more.
- Companion conversations. For the same reason as romances. I loved the individual conversations and the evolution of a platonic relationship over the years, but as with romances, it still felt thin sometimes.
Overall:Companions are just as well written as those in Origins. They grow and develop over the years, and I find it easy to relate or sympathize with them. This is something I've always considered a general strong point for Bioware though, so I'm not surprised. The only real failing here is that I wanted more than what we had. Which is a good issue to have, if there's to be any issue at all.
Visuals:Liked:- The new look of elves. They look much less like humans with pointy ears and actually a separate race now. One returning Origins character didn't look that great with the new style, though. But otherwise, the new elves are good in my book.
- Armor and weapons. For the most part, I like the new armor and weapon styles. There were a few individual sets that felt "meh" to me, but that always happens to me in games.
- Artwork in the main menu/loading screens/Varric's narration. I LOVE these. SO. MUCH. If Bioware ever released a book on the loadscreen art alone, I'd buy it.
- Faces. Overall, faces are improved and more distinct than they were in Origins. I also like the improvement in darker skin tones and more hairstyles/beards.
- Qunari. I love their redesign. They feel less like giant humans. Also, the arishok is awesome. Both in visuals and in voice.
- Lighting. Lighting is so, so MUCH better than in Origins. My only true gripe with the lighting is that sometimes the lower front teeth on someone's mouth will be so dark they look like they're missing. I'm not sure if this is due to one of the many apparent DirectX 11 issues DA2 has, but it is odd to see.
- Environments. There's a lot of beautiful (or wonderfully ugly) locations in Kirkwall and its surrounding areas.
- Generally improved graphics. Origins looked nice on my PC on high settings, DA2 looks even better. It's not the best eyecandy, but for a Bioware game I think it's very nice.
- As mentioned in gameplay, improved animations. There's still some awkwardness inherit in the engine, but people felt more alive and active in DA2 than they did in Origins.
Disliked:- Clipping issues with some beards on certain male presets. It seems like some beards don't work with some preset shapes, which is a bit limiting in creation. However, it's preferable to the skeleton cheeks in Origins. Cheeks still get gaunt with beards, but nowhere near the way they did in Origins. For the most part, it looks natural.
- The new style of a few returning companions is... Eh. Most look great, a few look... Off. I can tell it's them, but they don't feel quite right.
- Fingers. They didn't look good in Origins either, but DAMN. Fingers are often WAY darker than the rest of the body and on Isabela, they look especially blah. This normally wouldn't be an issue, but there's more animations that involve hand gestures this time around, and I find myself looking at hands more often. Not a major problem, but still distracting sometimes.
Overall:Minus the glitches covered in the next section, the visuals are very nice. Not the top of the line for current games, but they never are with Bioware. I'd rather have more content than eyecandy, anyway. What is here is very good with high settings, and I found myself drawn to a lot of the character visuals and environments. I've heard they look washed out on consoles, but I've only played the PC version on high settings, so I can't vouch for that one way or the other. Body language and expressions are improved, though they still sometimes feel a bit lacking or awkward. In the end, it's still an improvement from Origins with a more distinct identity.
Technical:Rather than break this down into a like/dislike, I'm just going to cover the technical issues I encountered. For the most part, the game is stable and I rarely encountered anything game stopping... But it is still noticeably buggy. I played using DirectX 11 instead of 9, which has been reported to be pretty buggy. My guess is a lot of my visual issues might be rooted to this, so I hope they're fixed in a patch.
WARNING: Some minor spoilers for Origins and Awakening ahead.Issues:- If I left the game paused for a few minutes, sometimes the area shadows would start spazzing out and moving at a rapid rate. They'd disappear once I unpaused, but it was still odd.
- My romance with Leliana was not recognized in her cameo. For both Legam and Ahmed. What's amusing, though, is while she didn't seem to remember my dwarf casteless, she DID remember Isabela and fooling around with her at the Pearl.
- During Declan's play, someone mentioned the Architect was alive. When I had imported a Warden who killed him.
- Isabela never changed to her alternate outfit beyond the first two seconds from when she should have had it. Then in her next shot, she was back to her default. I never saw the alternate outfit on her again.
- During Kenley's play, Aveline never changed into her final armor. She only had the second armor. In Armela's play, during a conversation cutscene with Sebastian, she suddenly had her prologue armor on. But only during that one scene. When I Saw her again, she was back in her final armor. Very strange.
- Merrill's act 3 conversations are out of order. During both Declan and Kenley's plays, I got her post-quest conversation... Before I even did it. So I sort of spoiled it for myself. This didn't happen with Armela, though.
- Occasionally, weapons and shields would glitch invisible during a scene before reappearing again. For no reason.
- The murder knife floats in the air when being sheathed in one scene. Every time, no matter who I'm playing. Works fine the rest of the time, though.
- During the Isabela and Merrill romance scenes, there's always a few flickers in the graphics. They last only a second, but they're distracting.
- I might be remembering this wrong, but during my Armela play, Meredeth had a different weapon for most of Act 3 instead of her regular one. I can't say more without spoiling major things, but... It's a BIG mistake. And I have no idea why it only happened with Armela.
- During Armela's play, at one of the climax cutscenes, the lip syncing and voices were out of sync every time I played the scene. This also happened when meeting Fenris, only his eventually worked after a few reloads.
- Random lag. Out of the blue - sometimes during/right after big fights, but not always - the framerate about DIED. It happened rarely, but just often enough to be annoying. And it happened during every playthrough at least a few times.
- Possibly the most annoying bug for me: Once in a while, for some reason I'd be unable to click on anything or anyone. The mouse moved and and keyboard controls worked, but the pointer wouldn't change for talking/using objects/selecting doors. Basically making the game unplayable. I'd have to exit out of DA2 and reopen it to fix it. Like the lag, it only happened once in a while, but just often enough to be quite frustrating.
Overall: This is where Dragon Age 2 trips up the most for me. While I don't have as many issues as some other players have reported, this is the buggiest Bioware game I've played, including Origins - which could get buggy itself. This is both with and without mods. As said before, the only mod I have is added the default Hawke hairstyles to the character creator. The bugs in this game aren't enough to ruin my experience, thankfully. They are, however, prevalent enough to warrant attention and be distracting sometimes.
All in all, I really enjoyed Dragon Age 2 and I know I'll be replaying it more in the future. It's not a perfect game and suffers from some annoying bugs, but it's worth playing if you liked Origins, especially if for the story/characters.